Russia
The distance across the Bering Strait from Siberia to Alaska's Seward Peninsula
is approximately 55 miles

Click to expand...

that's closer than cuba... from the southern most tip of florida in key west... it's 90 miles to cuba.

other than those... Greenland is probably closest to NE... but is that a Denmark tributary?
The Islands in the caribbean like Jamaica, Haiti, Dominican Republic.
Central America... I think Belize would be the closest.